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Finding the Fourth Proportional to 399,246.34, 550,968.29 and 217,965.91

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Solution

The fourth proportional to 399,246.34, 550,968.29 and 217,965.91 is: 300,797.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,246.34 : 550,968.29 = 217,965.91 : x
  2. Step 2: Convert to fraction form
    399,246.34/550,968.29 = 217,965.91/x
  3. Step 3: Cross multiply
    399,246.34x = 550,968.29 × 217,965.91
  4. Step 4: Simplify right side
    399,246.34x = 120,092,304,710.99
  5. Step 5: Solve for x
    x = 120,092,304,710.99/399,246.34
  6. Step 6: Final answer
    x = 300,797.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.